[Shaun]

Mumford and Sons have unveiled a cryptic trailer for their forthcoming second album on their website.

The band posted the clip – entitled The Troubled Boys School, possibly a hint at the title of the follow up to their debut 'Sigh No More' – at Mumfordandsons.com.

Scroll down to watch the 36 second long video, which sees a host of instruments and the remnants of a street party – as well as a lone horse - scattered around what looks like a deserted school yard draped in bunting. These are cut with clips of a rowdy party on the same site. The short film ends with a shot of all four band members, suited and sat on a bench.

Mumford and Sons frontman Marcus Mumford recently broke his hand. The band are currently playing their European festival shows with two extra musicians filling in for Marcus on guitar and drums.

The band's new album is due for release on September 24 and is set to feature 'Below My Feet', 'Whispers In The Dark', 'Ghosts That We Knew' and 'Lover's Eyes'.

Mumford and Sons will release their tour film Big Easy Express on DVD on July 24. The film is available now on iTunes.

Youtube video